Selenite / Gypsum
Its silky glow is attractive, but it scratches easily enough to mark with a fingernail. Learn its mineral identity, hardness, care, common…
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Smoky Quartz
Ranges from pale tea-coloured quartz to nearly black morion. Learn its mineral identity, hardness, care, common treatments, authenticity notes and traditional associations.
Ametrine
Distinct purple and yellow zones make each piece visually individual. Learn its mineral identity, hardness, care, common treatments, authenticity notes and traditional…
Agate
Pattern, banding and translucency are usually more important than a single “grade”. Learn its mineral identity, hardness, care, common treatments, authenticity notes…
Onyx
A useful example of why trade names and mineral identity are not always the same thing. Learn its mineral identity, hardness, care,…
Jasper
Best appreciated for pattern and landscape-like colour rather than transparency. Learn its mineral identity, hardness, care, common treatments, authenticity notes and traditional…
Green Aventurine
Its hallmark is a subtle internal shimmer rather than a mirror-like flash. Learn its mineral identity, hardness, care, common treatments, authenticity notes…
Tiger’s Eye
The cat’s-eye band is the defining visual feature and is strongest on well-oriented polished surfaces. Learn its mineral identity, hardness, care, common…
Celestite
Often appears as delicate sky-blue crystals lining pale matrix or geode cavities. Learn its mineral identity, hardness, care, common treatments, authenticity notes…
Barite
Its heft is one of the easiest physical characteristics for beginners to notice. Learn its mineral identity, hardness, care, common treatments, authenticity…